Finding the Third Proportional to 40,980 and 55,620

Step by Step Solution

1. Step 1: Write the proportion equation
   40,980 : 55,620 = 55,620 : x
2. Step 2: Convert to fraction form
   40,980/55,620 = 55,620/x
3. Step 3: Cross multiply
   40,980x = 55,620 × 55,620
4. Step 4: Simplify right side
   40,980x = 3,093,584,400
5. Step 5: Solve for x
   x = 3,093,584,400/40,980
6. Step 6: Final answer
   x = 75,490.10